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Finding the Fourth Proportional to 101,811.04, 140,565.20 and 65,528.72

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Solution

The fourth proportional to 101,811.04, 140,565.20 and 65,528.72 is: 90,472.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,811.04 : 140,565.20 = 65,528.72 : x
  2. Step 2: Convert to fraction form
    101,811.04/140,565.20 = 65,528.72/x
  3. Step 3: Cross multiply
    101,811.04x = 140,565.20 × 65,528.72
  4. Step 4: Simplify right side
    101,811.04x = 9,211,057,632.54
  5. Step 5: Solve for x
    x = 9,211,057,632.54/101,811.04
  6. Step 6: Final answer
    x = 90,472.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.